ICs for Motor AN6612, AN6612S Motor Control Circuits ■ Overview AN6612 8 2 7 3 6 4 2.54 ■ Features • Wide range of operating voltage : VCC (opr) =1.8V ~ 8V • 2 package types • Fewer external parts • Speed control in steps with linear fine control • Output current limiting circuit is built-in 1 0.5±0.1 1.2±0.25 Unit : mm 9.4±0.3 The AN6612 and the AN6612S are the electronic governor circuits suitable for the rotating speed control of a low voltage and compact DC motor which is used for a small tape recorder, etc. 5 0.51min. 6.3±0.3 3.8±0.25 7.62±0.25 3 ~ 15˚ (3.45) + 0.1 0.05 0.15 – 8-Lead DIP Package (DIP008-P-0300B) AN6612S 8 2 7 3 6 4 5 0.3 4.2±0.3 6.5±0.3 0.15 0.65 0.1±0.1 1.5±0.2 1 5.0±0.3 0.4±0.25 1.27 0.6±0.3 Unit : mm 8-Lead SOP Package (SOP008-P-0225A) ■ Block Diagram VM VO VB GND 8 7 6 5 10kΩ R9 1kΩ R10 + Comparator Start Circuit – Ref.Voltage 1 VRM 2 3 4 VRP VI VCC ICs for Motor AN6612, AN6612S ■ Pin Descriptions Pin No. Pin Name Pin No. Pin Name 1 Current Sensor 5 GND 2 Reference Voltage 6 Base 3 Control 7 Output Base 4 VCC 8 Motor pin ■ Absolute Maximum Ratings (Ta= 25˚C) Parameter Symbol Rating Supply Voltage VCC 10 V Supply Current I4 5 mA AN6612 Power Dissipation AN6612 –20 ~ + 75 ˚C –40 ~ +150 Tstg AN6612S mW 200 Topr Operating Ambient Temperature Storage Temperature 400 PD AN6612S Unit ˚C –40 ~ +125 ■ Electrical Characteristics (Ta = 25˚C) Parameter Symbol Supply Current I4 Reference Voltage Starting Current Voltage Variable Characteristics for Rotating Speed Time Drift Characteristics for Rotating Speed Temperature Variation Characteristics for Rotating Speed Output Current Limit Voltage Condition min. V2– 1 VCC = 3V, R2–1 = 10kΩ 1.24 Ia VCC = 1.8V, Ra = 4.9Ω VCC = 1.8V ~ 4V, IL = 72mA (1.7g · cm) VCC = 3V, IL = 72mA, t = 15s ~ 10min. VCC = 3V, IL = 72mA, Ta = –20˚C ~ + 60˚C VCC = 3V 250 |∆NV| |∆NT| ∆NA * Vt (1 – 5) typ. max. 1.9 3 1.32 1.40 VCC = 3V Unit mA V mA 10 rpm/V 0.1 % – 0.035 %/˚C 0.7 0.6 0.8 V * In case that only IC temperature is changed. ■ Application Circuit 0.5Ω Motor M 10Ω 1 VR3kB 910Ω 2SA881A 2 1kΩ 10kΩ 3 – + 5 AN6612 AN6612S 6 7 VR500ΩB 4 8 + 0.47µF – 2.2µF –VCC +VCC Motor Constants Ra : Internal resistor = 4.9Ω Ka : Electromotive force constant = 0.4mV/rpm KT : Torque constant = 29g · cm/A Request for your special attention and precautions in using the technical information and semiconductors described in this material (1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. 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Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited. 2001 MAR